.courseDetail {
  height: 50%;
}
.courseDetail .courseDetail-title {
  width: 100%;
  background-color: rgba(255, 255, 255, 0.1);
  height: 50px;
  position: relative;
  top: -335px;
}
.courseDetail .icon-play {
  font-size: 50px;
  position: relative;
  top: -75%;
  left: 43%;
}
.introduce {
  height: 50%;
}
.introduce .introducetop {
  border-bottom: 1px solid #8a8a8a;
}
#newcourseName {
  font-size: 24px;
  font-weight: bold;
}
.frequencyequipment {
  text-align: left;
}
.frequencyequipment .frequency {
  width: 50%;
}
.frequencyequipment .equipment {
  width: 50%;
}
.fcontent {
  width: 50%;
}
.econtent {
  width: 50%;
}
#startBtn {
  position: fixed;
  bottom: 10px;
  width: 90%;
  height: 50px;
  background-color: blue;
  border-radius: 25px;
  color: #fff;
  text-align: center;
  font-size: 20px;
}
